Pollution in Northern Hemisphere helped cause 1980s African drought

Pollution in Northern Hemisphere helped cause 1980s African drought. Isn’t this interesting? I thought this line from the link above was telling:

We were able to do something that was good for us, and it also benefited people elsewhere,” Frierson said.

Is this the values that we want to hold? We only help ourselves, and hey if it happens to help others, that’s great. It almost sounds like “trickle down” economics doesn’t it? Boy that worked well.